diff options
| -rw-r--r-- | lib/libc/stdio/wscanf.3 | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/lib/libc/stdio/wscanf.3 b/lib/libc/stdio/wscanf.3 index ad43cb43520..c423b3bf4fb 100644 --- a/lib/libc/stdio/wscanf.3 +++ b/lib/libc/stdio/wscanf.3 @@ -1,4 +1,4 @@ -.\" $OpenBSD: wscanf.3,v 1.2 2011/11/02 22:29:07 schwarze Exp $ +.\" $OpenBSD: wscanf.3,v 1.3 2019/01/11 10:20:38 schwarze Exp $ .\" .\" Copyright (c) 1990, 1991, 1993 .\" The Regents of the University of California. All rights reserved. @@ -34,7 +34,7 @@ .\" @(#)scanf.3 8.2 (Berkeley) 12/11/93 .\" FreeBSD: src/lib/libc/stdio/scanf.3,v 1.24 2003/06/28 09:03:25 das Exp .\" -.Dd $Mdocdate: November 2 2011 $ +.Dd $Mdocdate: January 11 2019 $ .Dt WSCANF 3 .Os .Sh NAME @@ -389,10 +389,6 @@ a conversion, although it can be suppressed with the flag. .El .Pp -The decimal point -character is defined in the program's locale (category -.Dv LC_NUMERIC ) . -.Pp For backwards compatibility, a .Dq conversion of @@ -432,6 +428,23 @@ and .Fn vswscanf conform to .St -isoC-99 . +.Sh CAVEATS +On systems other than +.Ox , +the +.Dv LC_NUMERIC +.Xr locale 1 +category can cause parsing failures, for example because it may cause +a different character to be expected instead of the decimal point. +For security reasons, make sure that portable programs calling +these functions never call +.Xr setlocale 3 +with the +.Dv LC_ALL +or +.Dv LC_NUMERIC +categories but only use +.Dv LC_CTYPE . .Sh BUGS In addition to the bugs documented in .Xr scanf 3 , |